If what you are saying is true - you have most likely inherited such a trait through one or both parents, through normalisation of an abnormal median via practices and stimuli (which may include but not be limited to physical desensitisation, psychological desensitisation, and dietary) which affected the fitrah.
The best way to resolve such an issue would be to attempt to bring yourself back to a more normal median which is in tune with the God-given fitrah - the baseline of which is Islamic guidance, this way you will either succeed in bringing yourself back to normalisation after a struggle for which you will be rewarded - or at least pass an easier relay burden onto any offspring you beget (if you have any offspring) in which case you will also be rewarded.
Returning to fitrah can take generations - or can be instantaneous by Allah :swt: Who, when He decides anything, He says unto it: "BE", and it IS.
This is the struggle of creation since biological matter began to evolve - and this is how the human being reached the pinnacle of creation on earth. Pondering on the various possible stages and miniscule relay decisions including the development of fangs, venom, claws, fur, night vision, reception of sound, smell, hearing, sharp sight, vs mind and the subsequent ability to develop tools to do most of those things better, the female who carries the burden of children, the fact that more developed creatures actually carry the sack than lay eggs and go off on walkies - indicates multiple struggles and sacrifices along the way - and Allah has shown us that Islam is the best path to continued long term success in this world - and the heareafter.
And Allah :swt: knows best.
Regarding the claim that a wife must accept polygyny - i beg to assert that it may be the case that an understanding may be reached mutually between husband and wife within the limits of Allah :swt:
Al-Baqarah 2:221
وَلَا تَنكِحُوا۟ ٱلْمُشْرِكَٰتِ حَتَّىٰ يُؤْمِنَّۚ وَلَأَمَةٌ مُّؤْمِنَةٌ خَيْرٌ مِّن مُّشْرِكَةٍ وَلَوْ أَعْجَبَتْكُمْۗ وَلَا تُنكِحُوا۟ ٱلْمُشْرِكِينَ حَتَّىٰ يُؤْمِنُوا۟ۚ وَلَعَبْدٌ مُّؤْمِنٌ خَيْرٌ مِّن مُّشْرِكٍ وَلَوْ أَعْجَبَكُمْۗ أُو۟لَٰٓئِكَ يَدْعُونَ إِلَى ٱلنَّارِۖ وَٱللَّهُ يَدْعُوٓا۟ إِلَى ٱلْجَنَّةِ وَٱلْمَغْفِرَةِ بِإِذْنِهِۦۖ وَيُبَيِّنُ ءَايَٰتِهِۦ لِلنَّاسِ لَعَلَّهُمْ يَتَذَكَّرُونَ
Do not marry unbelieving women (idolaters), until they believe: A slave woman who believes is better than an unbelieving woman, even though she allures you. Nor marry (your girls) to unbelievers until they believe: A man slave who believes is better than an unbeliever, even though he allures you. Unbelievers do (but) beckon you to the Fire. But Allah beckons by His Grace to the Garden (of bliss) and forgiveness, and makes His Signs clear to mankind: That they may celebrate His praise.
An-Nisa' 4:3
وَإِنْ خِفْتُمْ أَلَّا تُقْسِطُوا۟ فِى ٱلْيَتَٰمَىٰ فَٱنكِحُوا۟ مَا طَابَ لَكُم مِّنَ ٱلنِّسَآءِ مَثْنَىٰ وَثُلَٰثَ وَرُبَٰعَۖ فَإِنْ خِفْتُمْ أَلَّا تَعْدِلُوا۟ فَوَٰحِدَةً أَوْ مَا مَلَكَتْ أَيْمَٰنُكُمْۚ ذَٰلِكَ أَدْنَىٰٓ أَلَّا تَعُولُوا۟
If ye fear that ye shall not be able to deal justly with the orphans, Marry women of your choice, Two or three or four; but if ye fear that ye shall not be able to deal justly (with them), then only one, or (a captive) that your right hands possess, that will be more suitable, to prevent you from doing injustice.
An-Nur 24:32
وَأَنكِحُوا۟ ٱلْأَيَٰمَىٰ مِنكُمْ وَٱلصَّٰلِحِينَ مِنْ عِبَادِكُمْ وَإِمَآئِكُمْۚ إِن يَكُونُوا۟ فُقَرَآءَ يُغْنِهِمُ ٱللَّهُ مِن فَضْلِهِۦۗ وَٱللَّهُ وَٰسِعٌ عَلِيمٌ
Marry those among you who are single, or the virtuous ones among yourselves, male or female: if they are in poverty, Allah will give them means out of His grace: for Allah encompasseth all, and he knoweth all things.
An-Nisa' 4:22
وَلَا تَنكِحُوا۟ مَا نَكَحَ ءَابَآؤُكُم مِّنَ ٱلنِّسَآءِ إِلَّا مَا قَدْ سَلَفَۚ إِنَّهُۥ كَانَ فَٰحِشَةً وَمَقْتًا وَسَآءَ سَبِيلًا
And marry not women whom your fathers married,- except what is past: It was shameful and odious,- an abominable custom indeed.
An-Nur 24:3
ٱلزَّانِى لَا يَنكِحُ إِلَّا زَانِيَةً أَوْ مُشْرِكَةً وَٱلزَّانِيَةُ لَا يَنكِحُهَآ إِلَّا زَانٍ أَوْ مُشْرِكٌۚ وَحُرِّمَ ذَٰلِكَ عَلَى ٱلْمُؤْمِنِينَ
Let no man guilty of adultery or fornication marry and but a woman similarly guilty, or an Unbeliever: nor let any but such a man or an Unbeliever marry such a woman: to the Believers such a thing is forbidden.
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We see that the emphasis and preference is on one wife, polygyny -it appears- is only a license in case of circumstantial difficulty.
And Allah :swt: knows best.
